boissonnet



(No Model.) 3 Shets-Sheet 1 L. BOISSONNET.

PORCELAIN KILN. No. 383,695. Patented May 29, 1888.

(No Model.) 3 Sheets-Sheet 2.,

L. BOISSONNBT.

PORCELAIN KILN.

No. 383,695. Patented May 29, 1888.

(No Model.) 3 Sheets-Sheet 3.

L. BOISSONNET.

PORCELAIN KILN.

No. 383,695. Patented May 29, 1888.

UNITED STATES PATENT OFFICE.

LOUIS BOISSONNET, OF ST. VALLIER, FRANCE.

PORCELAIN-KI LN.

SPECIFICATION forming part of Letters Patent No. 383,695, dated May 29, 1888.

Application filed August 27, 1887. Serial No. 248,061. (No model.) Patented in France November 5, 1886, No.170,457; in Bel gium May 9, 1887, No. 77,375; in Spain May 13, 1887. No. 11,111; in England May 13, 1887, No. 7,038, and in Italy May 21,1887,

To all whom it may concern:

Be it known that I, LOUIS BOISSONNE'I, a citizen of the French Republic, residing at St. Vallier, in the French Republic, have invented certain new and useful Improvements in Porcelain-Kilns, (for which I have obtained Letters Patent in France bearing date November 5, 1886, No. 179,457; in Belgium hearing date May 9,1887,No. 77,375; in Italy bearing date May 21, 1887, No. 21,706; in Spain bearing date May 13, 1887, No. 11,111, and in England hearing date May 13, 1887, No. 7,038,) of which the following is a full, clear, and exact description.

Referring to the drawings, Figure 1 is an elevation, and Fig. 2a top plan view, of akiln constructed according to my invention. Fig. 3 is a vertical transverse section thereof, and Figs. 4 and 5 are sections taken on lines or a: and 3 y of Fig. 3.

The invention relates to porcelain kilns'or ovens, and has for its object to provide means for the more uniform distribution of the heat throughout the kiln, the losses from burning or flashing being lessened and an economy in fuel effected.

To these ends the invention consists in the construction of the kiln, substantially as hereinafter described, and as set forth in the claim.

In the usual construction of this class of kilns the heatand products ofcombustion from the furnaces are admitted to theinterior of the kiln through one or more, usually three, oblong narrow openings. In front of these are arranged two strong walls offire clay connected with one another and with the kiln-wall by means of cross-divisions, also of refractory material, the object of this arrangement being to subdivide the heat and drive it or cause it to pass in all directions throughout the kiln. It is well known that these cross-divisions under the influence of varying temperatures become detached and fall to the floor of the kiln, thus destroying the fines formed thereby and by the massive walls erected in front of the furmace-openings, and consequently resulting in an uneven distribution of the heatin the kiln. On the other hand, the goods placed directly in front of these massive walls were not heated erable loss in fuel and a still greater loss in damaged goods, due either to overfiring or not firing enough.

As stated above, the object of this invention is to obviate these losses and effect an economy in fuel by a more uniform distribution of the heat throughout the kiln.

In its general construction my improved kiln is substantially the same as the style of kiln heretofore used. It is cylindrical in form, has the usual chamber, 0, for strong firing, surmounted by the howel or crown G for raw burning, from which latter extends the chimney G The kiln is provided with four furnaces, F, at the extremities of the two median lines, and the chamber 0 communicates with the chamber 0 by a plurality of fines or passages, c'. (More plainly shown in Fig. 3.)

The improvements consist in the arrangement of the furnaces relatively to the inner wall of the kiln, the said furnaces being so arranged and the inner wall of the kiln so constructed as to form in front of each fire-bridge f a vertical flue, F, that extends nearly to the roof of the chamber 0, and under its floor, into which it opens at f, three rows of openings, f being formed in the inner wall, which is usually of refractory brick, for the passage of the heat and products of combustion.

It is evident that by means of the described construction the heat and products of combustion not only radiate from the numerous openings in front of each furnace toward or to the center of the kiln, but also ascend vertically through the kiln after they pass through the floor-openingsf, thereby distributing the heat and products of combustion uniforml y throughstyle kiln is in my improved kiln occupied by ing-chambe'rbeing open at top, and flues under goods. I the floor of the kiln communicating with the Having described my invention, what I claim heat-distributing chamber and the firing-chami is ber, substantially as and for the purposes speci- 5 In a porcelain-kiln, the combination, with fied. A

the outer wall and the furnace for furnaces, of I In testimony thatIclaim the foregoingI have an inner wall extending from the fleor to near hereunto set my hand.

the roof ofthe kiln,and formin gwith the outer r 7} T wall and completely enveloping the firing- LOUIS BOISSOL 1o chamber, a heat-distributing chamber, said in- Witnesses:

ner wall having heat-distributing openings in CAMILLE CHARROPPIN,

front of the furnace or furnaces only, said heat- J ULEs PAROD. 

